.mosaic-block {
	position:relative;
	overflow:hidden;
	width:310px;
	height:200px;
}
.mosaic-backdrop {
	display:none;
	position:absolute;
	top:0;
	height:100%;
	width:100%;
	background:#111;
}
.mosaic-overlay {
	display:none;
	z-index:5;
	position:absolute;
	width:100%;
	height:100%;
	background:#111;
}